docs: def update_startup_byteman_script(self, byteman_startup_script):
          """
          Update the byteman startup script, i.e., rule injected before the node starts.
  
          :param byteman_startup_script: the relative path to the script
          :raise common.LoadError: if the node does not have byteman installed
          """
          if self.byteman_port == '0':
              raise common.LoadError('Byteman is not installed')
          self.byteman_startup_script = byteman_startup_script
          self.import_config_files()